Add a progress tracker to the Backfill UI (succeeded / failed DAG runs)

[shivaam]

Proposal:

Hey everyone 👋

Our team uses backfills heavily, and one pain point we keep running into is the lack of visibility into how a backfill is actually progressing.

Right now there's no easy way to answer simple questions like:

• How many DAG runs are still pending?
• Did any runs fail?
• Is this backfill even moving?

The DAG Runs UI doesn't show the backfill ID, and the Backfill UI doesn't show the linked DAG runs — so you're left cross-referencing manually or digging through logs.

What I'm proposing

A simple progress tracker on the Backfill detail page that shows the breakdown of linked DAG runs by state: pending, running, succeeded, and failed — similar to what you'd see in a CI pipeline summary.

Here's a rough mockup of what it could look like:

Nothing fancy — just enough to answer "how's my backfill doing?" at a glance.

Prior art

This has been discussed before in #18317 and #41542, but those were broader UX overhauls. This is intentionally smaller in scope — just surfacing state counts for the DAG runs tied to a given backfill, now that Airflow 3 has proper backfill IDs and a dedicated backfill UI to build on.

Happy to submit a PR if there's appetite for this. Would love to hear if others have run into the same issue, or if there are concerns about the approach before I dig in.

[potiuk]

Yeou cna always submit a PR - i do not think we need to discuss every single small think like that. Let lack of answer in discussions do not discourage you from iterating on and completing good PR - discussion over green PR where anyone can easily run locally is always best.

[shivaam]

Sure, I will raise a PR directly. This is a small change that can be easily tested.